Factories in Ontario, California
Ontario, California has 397 manufacturing facilities in EPA records, 1% of the state's total. The most common are fabricated metal products, chemicals and vehicles, aircraft and parts.
- City
- Ontario, CA
- County
- San Bernardino
- In EPA records
- 397
- Factory pages
- 0
- New plants
- 0
- Revised
- November 1, 2026
What is made in Ontario
| Industry | Facilities |
|---|---|
| Fabricated metal products 332 | 64 |
| Chemicals 325 | 47 |
| Vehicles, aircraft and parts 336 | 44 |
| Machinery 333 | 38 |
| Plastics and rubber 326 | 34 |
| Medical devices and other goods 339 | 27 |
| Food 311 | 22 |
| Printing 323 | 18 |
| Furniture 337 | 17 |
| Paper 322 | 12 |
| Glass, cement and stone 327 | 12 |
| Primary metals 331 | 10 |
| Computers and electronics 334 | 10 |
| Wood products 321 | 9 |
| Electrical equipment and appliances 335 | 9 |
| Beverages and tobacco 312 | 6 |
| Textile mills 313 | 4 |
| Apparel 315 | 4 |
| Leather goods 316 | 4 |
| Petroleum and coal products 324 | 4 |
| Textile products 314 | 2 |
Active facilities in EPA's ECHO database with a manufacturing industry code and an address in Ontario. Industry is each facility's main reported code. How these records work.
By product
- Industrial machinery manufacturers: 28 in Ontario
- Chemical manufacturers: 19 in Ontario
- Commercial printers: 16 in Ontario
- Plastic injection molding companies: 14 in Ontario
- Metal plating and finishing companies: 13 in Ontario
- Packaging manufacturers: 10 in Ontario
- Electronics manufacturers: 10 in Ontario
- Medical device manufacturers: 10 in Ontario
- Corrugated box manufacturers: 8 in Ontario
- Metal fabrication companies: 8 in Ontario
Facilities in Ontario
The 30 with the most EPA program records, which usually means the larger sites.
| Facility | Industry |
|---|---|
| Danco En | Fabricated metal products |
| Danco Metal Surfacing | Fabricated metal products |
| New-Indy Ontario, LLC | Paper |
| Alger Precision Machining LLC | Fabricated metal products |
| Alumin Art Plating Co Inc | Fabricated metal products |
| Vishay Spectrol | Computers and electronics |
| Accuride International | Fabricated metal products |
| Acheson Colloids Company | Chemicals |
| Advantis Techs Inc | Chemicals |
| Alltech Inc | Food |
| Amrep Manufacturing Company LLC | Chemicals |
| Armorcast Products Company | Plastics and rubber |
| Benton Plating, Ind Division | Fabricated metal products |
| California Die Casting Inc | Primary metals |
| Chem Lab Products, Inc. | Chemicals |
| Dsm Nutritional Products | Chemicals |
| GE Engine Services | Vehicles, aircraft and parts |
| Griffith Micro Science Inc | Medical devices and other goods |
| Henry Co | Chemicals |
| Holliday Rock Ontario 28 | Glass, cement and stone |
| Hudson Technologies Company | Chemicals |
| Icl Products (Formerly Monsanto) | Chemicals |
| Kim Lighting | Primary metals |
| Leggett & Platt Inc | Plastics and rubber |
| Lighting Resources LLC | Chemicals |
| Linde - Ontario, Ca | Chemicals |
| Lockheed Aeronautical Systems Co Ontario | Vehicles, aircraft and parts |
| Oakwood Interiors | Fabricated metal products |
| Pioneer Plating | Fabricated metal products |
| Reel Furniture Inc | Furniture |